Beneficial Ownership Percentage to Trigger Shareholder Rights Plan

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- Definition

Common Shares, Reserved for Distribution

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- Definition

Plan of Reorganization, Equity Interest Issuable, Number of Shares

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- Definition

Shares Authorized, Par Or State Value Per Share

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
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- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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- Definition

Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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- Definition

The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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-Topic 230
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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

Number of new stock issued during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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Equity - Successor Equity (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended		3 Months Ended	4 Months Ended	9 Months Ended	12 Months Ended
	Jan. 22, 2018	Feb. 10, 2017	Oct. 01, 2016	Feb. 28, 2017	Feb. 09, 2017	Dec. 31, 2016	Feb. 09, 2017	Oct. 01, 2016	Dec. 31, 2017	Dec. 31, 2015	Jun. 30, 2015
Successor
Class of Stock [Line Items]
Common stock, issued (in shares)						21,042,000			35,650,000
Common stock, par value (in dollars per share)						$ 0.001			$ 0.001
Shares authorized (in shares)						250,000,000			250,000,000
Successor \| New Common Stock
Class of Stock [Line Items]
Common stock, issued (in shares)			18,900,000					18,900,000
Common stock, par value (in dollars per share)			$ 0.001					$ 0.001
Shares reserved for future distribution			400,000					400,000
Shares issued									100,000
Successor \| Series A Warrants
Class of Stock [Line Items]
Number of shares to be issued			4,900,000					4,900,000
Shares issued			4,500,000						100,000
Exercise price of warrants (in usd per share)			$ 41.34					$ 41.34
Successor \| Series B Warrants
Class of Stock [Line Items]
Number of shares to be issued			2,100,000					2,100,000
Shares issued			1,900,000
Exercise price of warrants (in usd per share)			$ 42.03					$ 42.03
Successor \| Series A and Series B Warrant [Member]
Class of Stock [Line Items]
Class of Warrant, Number of Securities issued for Each Warrant			1					1
Successor \| Convertible Notes \| Convertible Debt
Class of Stock [Line Items]
Common stock issued for debt (in shares)		14,100,000	15,000,000.0	14,100,000	300,000	700,000	1,000,000.0
Debt conversion, original debt, amount		$ 263.7
Predecessor
Class of Stock [Line Items]
Shares held in treasury (in shares)										2,100,000
Predecessor \| Convertible Perpetual Preferred Stock
Class of Stock [Line Items]
Shares converted										200,000
Predecessor \| Common Stock and Preferred Stock
Class of Stock [Line Items]
Shares authorized, par value (usd per share)											$ 0.001
Predecessor \| Senior Notes \| Common Stock
Class of Stock [Line Items]
Common stock issued for debt (in shares)										28,000,000.0
Predecessor \| Convertible Debt
Class of Stock [Line Items]
Debt conversion, original debt, amount								$ 232.1		$ 255.3
Predecessor \| Convertible Debt \| Common Stock
Class of Stock [Line Items]
Common stock issued for debt (in shares)								84,400,000		92,800,000
Predecessor \| 7.5% Senior Notes Due 2021 And 8.125% Senior Notes Due 2022 \| Senior Notes
Class of Stock [Line Items]
Debt conversion, original debt, amount										$ 50.0
Predecessor \| Minimum \| Common Stock
Class of Stock [Line Items]
Shares authorized (in shares)											800,000,000.0
Predecessor \| Minimum \| Convertible Perpetual Preferred Stock
Class of Stock [Line Items]
Shares authorized (in shares)											50,000,000.0
Predecessor \| Minimum \| Common Stock and Preferred Stock
Class of Stock [Line Items]
Shares authorized (in shares)											850,000,000.0
Predecessor \| Maximum \| Common Stock
Class of Stock [Line Items]
Shares authorized (in shares)											1,800,000,000
Predecessor \| Maximum \| Convertible Perpetual Preferred Stock
Class of Stock [Line Items]
Shares authorized (in shares)											50,000,000.0
Predecessor \| Maximum \| Common Stock and Preferred Stock
Class of Stock [Line Items]
Shares authorized (in shares)											1,850,000,000
Subsequent Event [Member]
Class of Stock [Line Items]
Beneficial ownership percentage by person or group of persons required to trigger shareholder rights plan	15.00%